The PADME experiment, hosted at the Laboratori Nazionali di Frascati in Italy, is dedicated to the dark photon search. It looks for the reaction $e^{+},e^{-} ightarrow A',gamma$, where $A'$ indicates the dark photon. The $550, ext{MeV}$ positrons beam that impinges on electrons, coming from an active diamond target, allows to scan $A'$ masses up to $23.7, ext{MeV}$. In this context, the segmented electromagnetic calorimeter plays a fundamental role, since it measures the final photon four-momentum. It consists of $616$ BGO crystals displaced in a cylindrical shape of $approx29, ext{cm}$ radius with a central square hole of $5$ crystals side, to let Bremsstrahlung radiation pass, to limit the calorimeter trigger rate. Each crystal is read by a HZC XP1911 type B photomultipliers and their signal is digitised by means of a CAEN V1742 board, taking $1024$ samples at $1, ext{GS/s}$. Here we report in detail the solutions adopted for the calorimeter together with the results obtained in tests performed on a small prototype and on single scintillating units.
First results on the performance of the PADME electromagnetic calorimeter / Piperno, G.; Chiodini, G.; Caricato, A. P.; Oceano, I.; Oliva, F.; Spagnolo, S.; Albicocco, P.; Bedogni, R.; Bossi, F.; Buonomo, B.; de Sangro, R.; Domenici, D.; Di Giulio, C.; Finocchiaro, G.; Foggetta, L. G.; Ghigo, A.; Giacchino, F.; Gianotti, P.; Palutan, M.; Sarra, I.; Sciascia, B.; Spadaro, T.; Spiriti, E.; Taruggi, C.; Vilucchi, E.; Ameli, F.; Ferrarotto, F.; Leonardi, E.; Safai Tehrani, F.; Valente, P.; Long, E.; Organtini, G. C.; Raggi, M.; Fiore, S.; Liberti, B.; Martini, M.; Alexander, J.; Frankental, A.; Kozhuharov, V.; Georgiev, G.; Ivanov, S.; Simeonov, R.; Tsankov, L.. - In: JOURNAL OF INSTRUMENTATION. - ISSN 1748-0221. - 15:05(2020). (Intervento presentato al convegno Innovative Particle and Radiation Detectors tenutosi a Siena (IT)) [10.1088/1748-0221/15/05/C05008].
First results on the performance of the PADME electromagnetic calorimeter
Piperno, G.
;Oliva, F.;Bossi, F.;Buonomo, B.;Palutan, M.;Sciascia, B.;Spadaro, T.;Vilucchi E.;Ameli, F.;Safai Tehrani, F.;Valente, P.;Long, E.;Organtini, G. C.;Raggi, M.;Fiore, S.;Liberti, B.;Kozhuharov, V.;
2020
Abstract
The PADME experiment, hosted at the Laboratori Nazionali di Frascati in Italy, is dedicated to the dark photon search. It looks for the reaction $e^{+},e^{-} ightarrow A',gamma$, where $A'$ indicates the dark photon. The $550, ext{MeV}$ positrons beam that impinges on electrons, coming from an active diamond target, allows to scan $A'$ masses up to $23.7, ext{MeV}$. In this context, the segmented electromagnetic calorimeter plays a fundamental role, since it measures the final photon four-momentum. It consists of $616$ BGO crystals displaced in a cylindrical shape of $approx29, ext{cm}$ radius with a central square hole of $5$ crystals side, to let Bremsstrahlung radiation pass, to limit the calorimeter trigger rate. Each crystal is read by a HZC XP1911 type B photomultipliers and their signal is digitised by means of a CAEN V1742 board, taking $1024$ samples at $1, ext{GS/s}$. Here we report in detail the solutions adopted for the calorimeter together with the results obtained in tests performed on a small prototype and on single scintillating units.| File | Dimensione | Formato | |
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Piperno_First_2020.pdf
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